Coiled-wire bed-bottom



i (No Model.)

T. W. KLIPFEL. GOILED WIRE BED BOTTOM.

No. 477,662. Patented June 28, 1892.

UNITED STATES PATENT OFFICE.

THOMAS WV. KLIPFEL, OF CHICAGO, ILLINOIS.

COILED-WIRE BED-BOTTOM.

SPECIFICATION forming part of Letters Patent No. 477,662, dated June 28, 1892. Application filed May 11, 1891. Serial No. 392,292. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS W. KLIPFEL, a citizen of the United States, residing at Chicago, Illinois, have invented certain new and useful Improvements in Coiled-WVire Bed- Bottoms, of which the following is a specification.

My invention relates to a novel method of locking together in rows the individual spiral springs of acoiled-wire bed-bottom by means of a tie-wire extending across the bed-bottom parallel to the rows and connecting the several springs and spur-wires which project from the top coil of the several springs so as to interlock with an adjacent spring and with the tie-Wires; and my invention consists in the novel method of interlocking the parts, as hereinafter described, and particularly 'pointed out in the claim.

In the accompanying drawings, Figure 1 is a perspective view showing four spiral springs locked together by means of a tie-wire and spurs from the several springs. Fig. 2 is a view of a single spring, showing the spun wires; and Fig. 3 illustrates in detail one method of arranging the tie-wire and spring with reference to each other.

In carrying out my invention I prefer to construct the individual springs, the bodies of which are marked A, of double-conical spiral form that is to say, the coils decrease in size from each end toward the middle. The end coils B are each provided with a lateral bend or kink b, and the tie-wires C have oppositely-projecting bends or kinks c. The spur-wires D project laterally from the end coils, substantially in the plane thereof, and have their ends formed into coils, the turns of the coils being perpendicular to the bedbottom and substantially in the plane of the tie-wires, whereby they may be interlocked with the tie-wires by turning or screwing the coils into the apertures between the overlapped portions of the wires and springs.

In connecting the several springs the tiewire has its kink passed through the top coil from below, as shown at E, Fig. 1; or the tiewire maybe passed through the top coil, so

that said coil shall rest upon the tie-wire at one side of the kink and beneath the tie-wire on the opposite side of the kink, as shown at F, Fig. 1; or the tie-Wire may be simply laid upon the top of the spring, as shown in Fig. 3, with their kinks lapping by each other, or the tie-wire might be placed below the last coil of the spring with their kinks overlapping. The only essential is that the two oppositely-projecting bends or kinks shall lap by each other, so as to provide the openings 6 andf, Fig. 3, through which the end of the spur-wire may be turned. In joining these coils into a bed-bottom one of the individual spirals-such as shown in Fig. 8will be taken in the hand and the point of the screw of the spur-wire will be inserted between the overlapped portions of the tie-wire and the spurwire through the space f, and then by rotating the spiral in a vertical plane (supposing the bed-bottom to be lying horizontally) the point of thescrewwill be turned down through the space e, between the kinks of the tie-wire and the spring. The several spirals are interlocked in the same way, and each spur-wire thereof rigidly connects the two spirals, and the tie-wire being interlocked with one of said spirals is also engaged by the turns of the spur-wire in such manner as to prevent movement in the direction of the length of the tie-wire. The opposite ends of the springs are secured in the same manner, the character of the spring permitting sulficient fiexure of its body to allow the screwing of its spur-wire into place. This latter feature is an important consideration which has not yet been provided for in the construcas I am aware. It makes the completed bedbottoin much more rigid laterally without impairing the vertical spring action.

I do not limit my invention to the particular manner of disposing of the tie-wire with reference to the spring, as it is evident from the foregoing explanation that the tie-wire may be placed on top of the spring or beneath it or passed through it.

I claim- A bed-bottom composed of spiral springs, each having on their end coils lateral bends, in combination with tie-wires for connecting the springs in rows, said tie-wires having tion of bed-bottoms of this character, as far I bends opposing those of the springs and overlapping them, and spur-wires for connecting the rows of the springs, the spur-wires having their ends formed into coils the turns of 5 which are perpendicular to the plane of the bed-bottom and lie substantially in the plane of the tie-wires, whereby the tie-wires and springs may be interlocked by turning or screwing the spur-wire coils into the apextures between the overlapped portion of the [O tie-wires and springs, substantially as described.

THOMAS XV. KLIPFEL. Witnesses:

G. O. LINTHICUM, FREDERICK C. GooDWIN. 

